I can't say that I have ever run into that situation. However, you have the right idea. If you file a single action, the worst thing that would happen is the clerk would tell you that you need additional funds. If you don't pay, you don't move forward. You can also call and ask the clerk. They won't give you legal advice, but their job is to determine and collect the filing fee. You might as well ask.
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Depending on your income, you could apply for a fee waiver, but that is up to the court to grant or deny it.
My name is Stephen R. Cohen and I have practiced over 38 years and can be reached at 213-819-1171. I practiced mainly in Los Angeles and Orange County, California. I am not seeking clients from existing relationships with other attorneys, and give only limited advise over the phone (the phone is primarily used to set appointments), these services do not create an attorney client relationship. I apologize for mispelling< as I am a lousy typist, My answers may offend as I do not believe in pulling punches or sugar coating the truth. Further regarding courts in other states my opinions are largely based on logic and what I think is the modern trend which is to consider the needs of the child.
If indigent, court may be able to waive the fee. Section 45.001 of the Texas Family Code is what you should read regarding changing the names of children and adults. I believe that you can file it under one petition. I can't see any reasoning behind doing 4 separate petitions.
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